'Daniell [Evarts], m. Rebeckah Dowd, first Wednesday in Mar., 1664, by Mr.Leet'
Assuming this is the year 1663/64, this would be 2 Mar 1664. Assuming the records are accurate, Daniel's first wife died 31 March 1664 and his first child by Rebecca was 19 December 1664, so the date of the marriage had to be in March 1663/64.